Carriage-wrench



(No Model.) n

J. W. CARVER. CARRIAGE WRENCH. No. 548,696. Patented 0015.29, 1895.

`INVENTOR @QA/ugh,

ATTORNEY citizen of the United UNITED STATES' PATENT EEICE.

JAMES W. CARVER, OE GRANVILLE, NEW YORK.

CARRIAGE-WRENCH.

sPEcIEIcATioN forming pm of Lettefsratnt Nq. 548,696, dated october 29,1895.` Application led November 6, 1894. Serial No. 528,009. (N model.)

To @ZZ whom. it may concern: Y

Be it known that I, JAMES W. CARVER, a

States, residing at Granville, in the county of Washington and State of`N ew York, have invented certain new and useful Improvements inCarriage-Wrenches, of which the following is a full, clear, and eX- actspecification.

This invention relates to carriage-wrenches; and it comprises a clampwhich is operated bya compound screw, being specially adapted fortightening and loosening the nuts, which secure carriage-wheels inplace.

In order that my invention may be fully described and explained indetail, I have an? nexed hereto a sheet of drawings, in which- Figure lis a side elevation of the carriagewrench complete. Fig. 2 is a planView. of Fig. 1. Fig. 3 is a right end viewof Fig. 1. Fig. 4 is acentral vertical section of Fig. l.

In the drawings, A indicates the central main portion of the wrench, thesaid portion A having the nut-receiving mouth a. Below said mouth a andthrough the body portion A is a transverse aperture b. The central plainor pivotal portion c of the compound screw is placed within thisaperture b and is held from lateral movement therein by means of agroove d and a pin e, engaging in said groove. The right andleft handscrewsf g, which are connected with the central portion c, forming acompound screw, are passed, respectively, through side pieces hr2, thethreads of said screws engaging with like threads withinv the saidpieces he'. Laterally-extending pins j la are secured at either side ofthe portion A, the said pins passing loosely through pivotalbearings Zmin the side pieces 7L c'. A handle n is secured to the portion A,

preferably as shown in the drawings, and a crank-handle ois fastened atthe free end of one of the screws f g, preferably asshown in thedrawings, for the purpose of operating the wrench.

It will be readily seen from the above de= scription, taken inconnection with the atlnexed drawings, that the movement of the handle owill cause the side pieces h i to travel toward or from the central mainportion A, the said pieces their movement by the pinsj le. It will thusbe understood that upon inserting the mouth portion a over the nut in awheel-hub and then causing the side pieces h i to travel outwardly theroughened surfaces p q of said side pieces will come in contact with theinside of the hub-flange and may obtain a lirm hold thereupon. Then bycontinuing to turn the crank o (the wheel-shaft being held againstrotation) the nut, which is within the mouth a, will be released ortighten ed, as may be desired.

Having now described my invention, I declare that what I claim is* Thecentral portion or body, provided with 'the nut mouth or recess in itsinner end, a handle 'n upon its outer end, and guiding pins j 7c uponits opposite sides; and having an opening b through its center, combinedwith the right and left hand screw, havinga groove d, at or near itscenter; the pin e, which extends transversely through the body and holdsthe screw in position, the two jaws h, t', placed upon the threadedportions of the screw and made to move in opposite directions, and hav--ing their inner and outer ends rounded away and roughened; and thehandle upon one end of the screw, whereby the wrench is supported inposition by the handle n, while the handle o is revolved to cause thejaws to move outward against the sides of the hub, substantially asshown.

In testimony that I claim the foregoing I have hereunto set my hand thislflth day of July, 1894.

JAMES W. CARVER.

being guided inl

